919664b29a
There seems to be some confusion from back when the example were mass-ported to the QOpenGL stuff in Qt 5 times. Pick-to: 6.4 6.2 Fixes: QTBUG-109119 Change-Id: Ic4bcd010df3fcf82e16385ce241b379f0c351788 Reviewed-by: Christian Strømme <christian.stromme@qt.io>
76 lines
2.3 KiB
C++
76 lines
2.3 KiB
C++
// Copyright (C) 2018 The Qt Company Ltd.
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// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause
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#include "fbopaintdevice.h"
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#include <QOffscreenSurface>
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#include <QOpenGLFunctions>
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QFboPaintDevice::QFboPaintDevice(const QSize &size, bool flipped, bool clearOnInit,
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QOpenGLFramebufferObject::Attachment attachment)
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: QOpenGLPaintDevice(size)
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{
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QOpenGLFramebufferObjectFormat format;
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format.setAttachment(attachment);
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format.setSamples(4);
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m_framebufferObject = new QOpenGLFramebufferObject(size, format);
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QOffscreenSurface *surface = new QOffscreenSurface();
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surface->create();
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m_surface = surface;
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setPaintFlipped(flipped);
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if (clearOnInit) {
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m_framebufferObject->bind();
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context()->functions()->glClearColor(0, 0, 0, 0);
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context()->functions()->glClear(GL_COLOR_BUFFER_BIT);
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}
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m_resolvedFbo = new QOpenGLFramebufferObject(m_framebufferObject->size(), m_framebufferObject->attachment());
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}
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QFboPaintDevice::~QFboPaintDevice()
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{
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delete m_framebufferObject;
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delete m_resolvedFbo;
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delete m_surface;
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}
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void QFboPaintDevice::ensureActiveTarget()
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{
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if (QOpenGLContext::currentContext() != context())
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context()->makeCurrent(m_surface);
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m_framebufferObject->bind();
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}
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GLuint QFboPaintDevice::texture()
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{
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m_resolvedFbo->bind(); // to get the backing texture recreated if it was taken (in takeTexture) previously
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QOpenGLFramebufferObject::blitFramebuffer(m_resolvedFbo, m_framebufferObject);
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return m_resolvedFbo->texture();
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}
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GLuint QFboPaintDevice::takeTexture()
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{
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m_resolvedFbo->bind(); // to get the backing texture recreated if it was taken (in takeTexture) previously
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// We have multisamples so we can't just forward takeTexture(), have to resolve first.
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QOpenGLFramebufferObject::blitFramebuffer(m_resolvedFbo, m_framebufferObject);
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return m_resolvedFbo->takeTexture();
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}
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QImage QFboPaintDevice::toImage() const
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{
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QOpenGLContext *currentContext = QOpenGLContext::currentContext();
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QSurface *currentSurface = currentContext ? currentContext->surface() : nullptr;
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context()->makeCurrent(m_surface);
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QImage image = m_framebufferObject->toImage(!paintFlipped());
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if (currentContext)
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currentContext->makeCurrent(currentSurface);
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else
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context()->doneCurrent();
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return image;
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}
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